Attachment for printing-presses.



A. FIELDS.

ATTACHMENT FOR PRINTING PRESSES.

APPLICATION FILED DEC.9, 1908.

3 vwemtoz Patented Apr. 13, 1909.

ALBERT FIELDS, OF RED OAK, IOWA.

ATTACHMENT FOR PBINTING-PRESSES.

Specification of Letters Patent.

Patented April 13, 1909.

Applicatien flled'December 9, 1908. Serial No. 486,659.

To all whom it may concern:

Be it known that I, ALBERT FinLns, a citizen ofthe United States of America, residing at Red Oak, in the county of Montgomery and State of Iowa, have invented new and useful Improvements in Attachments for Printing-Presses, of which the following is a specification.

This invention relates to attachments for printing presses, and one of the princi a1 objGGtS ofthe same is to provide simp e and eflicient means for preventing the feed of ink from the fountain to the-distributing rolls when the impression of the press has been thrown off.

, In many of the job printing presses, as at present constructed, means are provided for throwing off the impression when a sheet is improperly fed to the guide pins or when for any purpose the press feeder desires to leave the press tern orarily. Under these conditions the ink ountain is under constant operation and continuously feeds ink to the distributing rollers when the impression is thrown off. When the feeder returns to the press and starts to again feed the job, the ink fed by the fountain and carried by the form rollers over the form "is largely in excess of the amount required. As a result of this a condition some of the ink must be removed from the distributing rollers. It is to overcome this defect in feeding ink from the fountain that .my invention is designed.

The objects and advantages above referred to ma be attained by meansof the construction ilustrated in the accompanying drawing, in which,- m

Figure 1 is a side view of a portion of a printing press of well known construction aving my attachment connected thereto in position for operation. Fig. Zis a plan view of my attac ment disconnected from the press.

Referring to the drawing, the numeral 1 designates the frame of a job printing press of well known construction; 2 is the cam; 3 'is'the arm; 4 is the platen, and 5 is the throw-off lever.

6 is the ratchet wheel on the end of the fountain roller; 7 is the roller which takes the ink from the fountain roller and deposits it upon the distributing drum 8, the roller 7 being intermittently moved against the fountain roller by means of the cam roller 9 actuated by the cam '3, said roller being connected to a lever 10 pivoted at 11 to the frame of the machine. The distributing rollers are mounted in the frame 12,- while the form rollers are mounted in the frame 13.

In presses of this character means are provided for carrying the form rollers up and holding them above the platen 'so that as the )ress is operated after the impression has een thrown off the platen will not come in contact with the rollers.

The ratchet wheel 6 on the end of the fountain roller is actuated intermittently by means of a spring pawl 14 I ivoted upon the end of a lever 15, said lever eing pivoted at 16 to the frame and provided with a weight 17 at its outer end. A cam roller 18 is, journaled in the Wei ht 17, said roller bearing u on the cam w eel 2. The track for the rol er 18 is provided with a depression 19, shown in dotted lines in Fig. 1. When the roller 18 drops into the depression 19, the pawl 14 slips over one tooth of the ratchet wheel 6, and as the roller 18 passes over the elevated portion of the track on the cam wheel 2, the pawl 14 pushes the ratchet wheel '6 forward, thus bringing a quantity of ink upon the face of its rol er in position to be conveyed by the roller 7 to the distributing drum 8.

My invention is designed to prevent the roller 18 from following the depression 19 to prevent t e movement of the ratchet wheel 6 and the feeding of the ink from the fountain during the time that the impression is thrown off the press.

In carrying out my invention I utilize a spiral sprlng 0 having a hook I) at one end, said hook being connected to an eye 0 attached to the weight 17 of the lever 15. The spring 0. passes over a grooved roller (1 mounted in a bracket 6 provided with a bolt hole f by means of which said bracket may be secured to the frame 1 of the press. The end of -the spring at opposite the hook I) is connected to a late 9 provided with a hole h, .by means 0 which said plate is connected to the throw-ofi lever 5 of the press.

The operation of my invention may be briefly described as follows: When the impression is thrown off, the lever 5 assumes the dotted line position in Fig. 1, and this pulls upon the spring a to lift the weight 17 and to prevent the wheel 18 from ridin in the depression 19 of the cam wheel 2.

Tus

in the track u on the cam wheel 2 and hence ES PATENT OFFICE. a

' press with but slight alteration; the cost of 1 production is slight, and the device operates the pawl 14 fails to actuate the ratchet Wheel 6, and as a result ink is not fed from the fountain roller to the distributing rollers, and hence the ink ;is kept uniform so that when the feeder returns to the press the ink is of the same density as when he left it.

My invention is of simple construction, can be readily applied toany form of job smoothly and eflicientl I claim 1. An attachment for job printing presses for its purpose.

opposite end of said comprlsing a spr ng connected at one end to the lever WlllCh operates the fountain roller, a bracket secured to the press frame,

and a roller mounted in said bracket, said spring extending over said roller and the in presence of two witnesses.

ALBERT FIELDS. Witnesses:

WRIGHT CLARK, E. A. GANKEL. 

